[Bug math/6782] New: tan() does not set errno on domain error

[Bug math/6782] New: tan() does not set errno on domain error

[mtk dot manpages at gmail dot com]

For a domain error, tan() does not set errno.  It should set errno to EDOM.

NOTE: the inverse trig functions do correctly set errno on error!

Background: 
On error, many glibc math functions both set errno and raise an exception
(fetestexcept(3)).  For example, the following  function all do this: acos(),
asin(), cosh(), sinh(), acosh(), asinh(), exp(), exp2(), ldexp(), log(),
log10(), log2().  However, there is much inconsistency.  Some functions raise an
exception, but don't set errno.  Some functions set errno for some errors, but
not others.  A few set errno, but don't raise an exception.  This series of bug
reports documents deviations from what I consider the ideal: all functions
should BOTH set errno AND raise an exception for all errors.

All of these reports relate to tests on glibc 2.8 (as provided by SUSE 11.0).

-- 
           Summary: tan() does not set errno on domain error
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: aj at suse dot de
        ReportedBy: mtk dot manpages at gmail dot com
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6782

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[Bug math/6782] tan() does not set errno on domain error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 08:40 -------
Created an attachment (id=2847)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2847&action=view)
test program

test run showing problem

$ /tmp/mt_tan inf
errno == 0
fetestexcept() says:  FE_INVALID
tan(inf)=nan
0 FE_INVALID nan

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6782

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[Bug math/6782] tan() does not set errno on domain error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2010-09-11 15:09 -------
This bug was fixed in glibc 2.10. The man page is updated for man-pages-2.37.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|aj at suse dot de           |mtk dot manpages at gmail
                   |                            |dot com
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=6782

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[Bug math/6782] tan() does not set errno on domain error

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6782

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-02-29 21:02:04 UTC ---
This was fixed in 2009.

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